Thin sheets of ice coating highways across North Texas kept road crews busy throughout the night.

Icy patches could be seen on Interstate 35 overpasses late Tuesday night, and many side streets were covered in sheets of ice.

More than 300 local Texas Department of Transportation crews, as well as 82 crews from West Texas crisscrossed North Texas interstates in hopes of making the roads drive-able.

"We've done everything we can, and we followed the game plan," TxDOT spokeswoman Michele Releford said Tuesday.

TxDOT's plan involved sanding and treating major roads leading to Cowboys Stadium and Super Bowl events.

"These extra crews were brought in because of the Super Bowl," Releford said. "We knew we were going to need extra people to keep all the lanes of the major roadways open."

Some roads proved to be not driveable and had dozens of wrecks.

But Releford said some of the crashes were caused by driver error.

"This morning, I noticed the ice was more rough and it had more traction, and I think people were a little more cavalier about their driving, thinking it had been treated with something, or there was more traction, and it was just rough ice, and they had quite a few accidents," she said.

Officials say that drivers should still be cautious if the road has been treated with sand and salt.

The sand mixture TxDOT uses contains about 10 percent salt. The agency said it does not use more salt because it is too corrosive to bridges, roads and cars.

Releford said TxDOT plows were called in from West Texas because the agency's North Texas crews don't have such equipment.

She also said that sand and salt supplies were running low at one point, but supplies were brought in from Austin, San Antonio and Houston.

Crashes were reported across North Texas on Tuesday, with the drive home even worse than the morning commute in Dallas.